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2.3 M: Probability

2.3 M: Probability

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Question 131

A batch of industrial components contains 5 'Grade-A' units, 1 'Grade-B' unit, and 1 'Grade-C' unit. A quality control officer selects two units at random, one after the other, without replacement.

a.

Construct a tree diagram to represent all possible outcomes of this selection process, including the probabilities for each branch.

[4]
b.

Determine the probability that the officer selects exactly one Grade-B unit and exactly one Grade-C unit.

[2]
Markscheme

2.3 M: Probability Questions

  1. A Level
  2. /Maths
  3. /2.3 M: Probability

198 exam-style questions on AQA A Level Maths 2.3 M: Probability, covering 2.3.1 Mutually exclusive and independent events, 2.3.2 Conditional probability (A-level only), 2.3.3 Modelling with probability (A-level only), and 2.3 M: Probability. Each one has a worked solution and a mark scheme showing where the marks go.

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